"I am not sure why the food industry loves to underpay people."
Because they can. Your boss or company would do it too if they could. Or if they're too nice, the rest of your industry would do it if they could, and then your boss or company would feel that that's just the way it is.
Cheaper, "better", faster is actually doing us quite a bit of harm in the food industry. Such as foods that are meant to look pretty but have poor flavor & nutritional value, food borne illnesses, over-consumption of unhealthy foods & factory farm pollution.
Not really. If the idea is to source things as cheaply as possible to get the most profit then focus is on higher yield crops, not higher quality. So ultra cheap labor + ultra high yield = more profit. It does not = better product.
Because they can. Your boss or company would do it too if they could. Or if they're too nice, the rest of your industry would do it if they could, and then your boss or company would feel that that's just the way it is.